Glutathione injections can improve your skin's quality immensely, giving it back its natural glow and a brighter look. It can also help you reduce signs of aging, such as wrinkles and dark spots. What to avoid when injecting glutathione? Avoid taking alcohol when undergoing glutathione IV therapy, as it can prevent your body from fully absorbing the injection. Also, avoid smoking, taking inflammatory drugs like aspirin, and exposing yourself to sunlight. Again, avoiding other skin treatments when taking glutathione injections is essential. How many shades can glutathione lighten skin? The amount of IV sessions of glutathione depends on how many shades lighter you want your skin tone to be. One round of treatment is 10 IV's that will be performed twice a week for 5 weeks. Typically one round of treatment (10 IV's) can lighten the skin from 1 to 3 shades lighter. How long does glutathione take to whiten? Results visible on Light-medium brown skin: 1-3 months, Dark brown skin: 3-6 months, Very dark skin: 6-12 months & Black skin: 18 months minimum and above. A Glutathione efficacy in skin lightening works only if it is taken with Vitamin C at least equal or twice its dosage.